WD to buy Hitachi GST

Computer Type: PC/Desktop
System Manufacturer/Model Number: Home Built
OS: Windows 8.1 Pro w/Media Center 64bit, Windows 7 HP 64bit
CPU: Phenom II X6 1100T
Motherboard: ASUS M5A99X EVO
Memory: Crucial Balistic 8gb DDR3-1866 CL9
Graphics Card: MSI R6850 Cyclone IGD5 PE
Sound Card: On Board
Monitor(s) Displays: ASUS VE258Q 25" LED with DVI-HDMI-DisplayPort
Screen Resolution: 1920 x 1080
Keyboard: Logitech K120
Mouse: Logitech Marble Mouse USB, Logitech Precision Game Pad
PSU: Seasonic X650 80 Plus GOLD Modular
Case: Corsair 400R
Cooling: Antec Kuhler H2O 620, Two 120mm and four 140mm
Hard Drives: Two WD Cavier Black 2TB Sata III, WD My Book Essential 2TB USB 3.0
Internet Speed: 15MB
Browser: IE-11, FF-27
Antivirus: Norton IS 2013, Malwarebytes Pro Beta 2
Other Info: APC UPS ES 750, Netgear WNR3500L Gigabit & Wireless N Router with SamKnows Test Program, Motorola SB6120 Gigabit Cable Modem. Brother HL-2170W Laser Printer, Epson V300 Scanner

System Manufacturer/Model Number: Custom built
OS: Windows 7 Ultimate 64 bit
CPU: AMD Phenom II X4 965 Black Edition
Motherboard: Gigabyte GA-MA790X-DS4
Memory: GSkill 4 X 2 GB PC 8500
Graphics Card: XFX Radeon HD 6790 D
Sound Card: On board RealTek HD
Monitor(s) Displays: Dual monitors:Samsung SyncMaster S20B300
Screen Resolution: 1600 X 900
Keyboard: Logitech G510
Mouse: Razor DeathAdder
PSU: Ultra X4 750 watt fully modular
Case: Thermaltake Overseer RX 1 full tower
Cooling: Core-Contact 92 mm CPU Cooler
Hard Drives: Seagate Barracuda 1TB (primary) Seagate Barracuda 2 X 320 GB
Internet Speed: 50/5 Mbps UL/DL
Other Info: Optical: Super Muliti DVD burner w/lightscribe, Hauppauge WinTV HVR-1800